Impacts of atmospheric temperature trends on tropical cyclone activity
Impacts of tropical temperature changes in the upper troposphere (UT) and the tropical tropopause layer (TTL) on tropical cyclone (TC) activity are explored. UT and lower TTL cooling both lead to an overall increase in potential intensity (PI), while temperature changes at 70 hPa and higher have neg...
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ftncar:oai:drupal-site.org:articles_12699 2023-05-15T17:34:52+02:00 Impacts of atmospheric temperature trends on tropical cyclone activity Vecchi, Gabriel (Gabriel A. Vecchi) (authoraut) Fueglistaler, Stephan (Stephan Fueglistaler) (authoraut) Held, Isaac (Isaac M. Held) (authoraut) Knutson, Thomas (Thomas R. Knutson) (authoraut) Zhao, Ming (Ming Zhao) (authoraut) application/pdf https://doi.org/10.1175/JCLI-D-12-00503.1 http://n2t.net/ark:/85065/d7tb17r5 en eng American Meteorological Society Journal of Climate http://dx.doi.org/10.1175/JCLI-D-12-00503.1 articles:12699 uri: http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-018-951 doi:10.1175/JCLI-D-12-00503.1 ark:/85065/d7tb17r5 http://n2t.net/ark:/85065/d7tb17r5 Copyright 2013 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. Text article ftncar https://doi.org/10.1175/JCLI-D-12-00503.1 2022-08-09T17:30:30Z Impacts of tropical temperature changes in the upper troposphere (UT) and the tropical tropopause layer (TTL) on tropical cyclone (TC) activity are explored. UT and lower TTL cooling both lead to an overall increase in potential intensity (PI), while temperature changes at 70 hPa and higher have negligible effect. Idealized experiments with a high-resolution global model show that lower temperatures in the UT are associated with increases in global and North Atlantic TC frequency, but modeled TC frequency changes are not significantly affected by TTL temperature changes nor do they scale directly with PI. Future projections of hurricane activity have been made with models that simulate the recent upward Atlantic TC trends while assuming or simulating very different tropical temperature trends. Recent Atlantic TC trends have been simulated by (i) high-resolution global models with nearly moist-adiabatic warming profiles and (ii) regional TC downscaling systems that impose the very strong UT and TTL trends of the NCEP-NCAR reanalysis, an outlier among observational estimates. The impact of these differences in temperature trends on TC activity is comparable to observed TC changes, affecting assessments of the connection between hurricanes and climate. Therefore, understanding the character of and mechanisms behind changes in UT and TTL temperature is important to understanding past and projecting future TC activity changes. The UT and TTL temperature trends in the NCEP-NCAR reanalysis are unlikely to be accurate and likely drive spuriously positive TC and PI trends and an inflated connection between absolute surface temperature warming and TC activity increases. Article in Journal/Newspaper North Atlantic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Journal of Climate 26 11 3877 3891 |
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Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
Impacts of tropical temperature changes in the upper troposphere (UT) and the tropical tropopause layer (TTL) on tropical cyclone (TC) activity are explored. UT and lower TTL cooling both lead to an overall increase in potential intensity (PI), while temperature changes at 70 hPa and higher have negligible effect. Idealized experiments with a high-resolution global model show that lower temperatures in the UT are associated with increases in global and North Atlantic TC frequency, but modeled TC frequency changes are not significantly affected by TTL temperature changes nor do they scale directly with PI. Future projections of hurricane activity have been made with models that simulate the recent upward Atlantic TC trends while assuming or simulating very different tropical temperature trends. Recent Atlantic TC trends have been simulated by (i) high-resolution global models with nearly moist-adiabatic warming profiles and (ii) regional TC downscaling systems that impose the very strong UT and TTL trends of the NCEP-NCAR reanalysis, an outlier among observational estimates. The impact of these differences in temperature trends on TC activity is comparable to observed TC changes, affecting assessments of the connection between hurricanes and climate. Therefore, understanding the character of and mechanisms behind changes in UT and TTL temperature is important to understanding past and projecting future TC activity changes. The UT and TTL temperature trends in the NCEP-NCAR reanalysis are unlikely to be accurate and likely drive spuriously positive TC and PI trends and an inflated connection between absolute surface temperature warming and TC activity increases. |
author2 |
Vecchi, Gabriel (Gabriel A. Vecchi) (authoraut) Fueglistaler, Stephan (Stephan Fueglistaler) (authoraut) Held, Isaac (Isaac M. Held) (authoraut) Knutson, Thomas (Thomas R. Knutson) (authoraut) Zhao, Ming (Ming Zhao) (authoraut) |
format |
Article in Journal/Newspaper |
title |
Impacts of atmospheric temperature trends on tropical cyclone activity |
spellingShingle |
Impacts of atmospheric temperature trends on tropical cyclone activity |
title_short |
Impacts of atmospheric temperature trends on tropical cyclone activity |
title_full |
Impacts of atmospheric temperature trends on tropical cyclone activity |
title_fullStr |
Impacts of atmospheric temperature trends on tropical cyclone activity |
title_full_unstemmed |
Impacts of atmospheric temperature trends on tropical cyclone activity |
title_sort |
impacts of atmospheric temperature trends on tropical cyclone activity |
publisher |
American Meteorological Society |
url |
https://doi.org/10.1175/JCLI-D-12-00503.1 http://n2t.net/ark:/85065/d7tb17r5 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Journal of Climate http://dx.doi.org/10.1175/JCLI-D-12-00503.1 articles:12699 uri: http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-018-951 doi:10.1175/JCLI-D-12-00503.1 ark:/85065/d7tb17r5 http://n2t.net/ark:/85065/d7tb17r5 |
op_rights |
Copyright 2013 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. |
op_doi |
https://doi.org/10.1175/JCLI-D-12-00503.1 |
container_title |
Journal of Climate |
container_volume |
26 |
container_issue |
11 |
container_start_page |
3877 |
op_container_end_page |
3891 |
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1766133837953236992 |